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add 2048 bare minimum example #27

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odweta merged 3 commits from feat/add-2048-example into dev 2026-10-10 01:11:55 +02:00
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+115 -59
1 changed files with 115 additions and 59 deletions
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src/examples/2048.c
+113 -57
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@@ -3,6 +3,7 @@
#include <dangerzone/render/misc.h>
#include <dangerzone/render/text.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
@@ -24,6 +25,7 @@ typedef struct {
typedef struct {
uint32_t area[SIZE][SIZE];
dir_e direction;
uint32_t score;
} game_t;
static game_t game;
@@ -63,7 +65,7 @@ move()
case RIGHT:
for (int i = 0; i < SIZE; i++) {
uint32_t *row = game.area[i];
for (int j = SIZE - 1; j >= 0; j--) {
for (int j = 0; j < SIZE; j++) {
for (int k = SIZE - 1; k > 0; k--) {
if (game.area[i][k] == 0 && game.area[i][k - 1] != 0) {
game.area[i][k] = game.area[i][k - 1];
@@ -89,9 +91,9 @@ move()
break;
case DOWN:
for (int i = 0; i < SIZE; i++) {
for (int j = SIZE - 1; j >= 0; j--) {
for (int j = 0; j < SIZE; j++) {
for (int k = SIZE - 1; k > 0; k--) {
if (game.area[k][i] == 0 && game.area[k][i - 1] != 0) {
if (game.area[k][i] == 0 && game.area[k - 1][i] != 0) {
game.area[k][i] = game.area[k - 1][i];
game.area[k - 1][i] = 0;
retval = true;
@@ -141,6 +143,7 @@ combine_horizontal(
if (row[i] == row[i - direction]) {
retval = true;
row[i] *= 2;
game.score += row[i];
row[i - direction] = 0;
for (int j = i - direction; (game.direction == LEFT) ? j < end : j > end; j -= direction) {
row[j] = row[j - direction];
@@ -185,6 +188,7 @@ combine_vertical(
if (game.area[i][col_index] == game.area[i - direction][col_index]) {
retval = true;
game.area[i][col_index] *= 2;
game.score += game.area[i][col_index];
game.area[i - direction][col_index] = 0;
for (int j = i - direction; (game.direction == UP) ? j < end : j > end; j -= direction) {
game.area[j][col_index] = game.area[j - direction][col_index];
@@ -231,12 +235,16 @@ slide()
// 2. then combine them and shift the potential rest by one in the given direction
bool has_combined = combine(has_moved);
printf("moved? %s, combined? %s\n", (has_moved) ? "true" : "false", (has_combined) ? "true" : "false");
// printf("moved? %s, combined? %s\n", (has_moved) ? "true" : "false", (has_combined) ? "true" : "false");
// 3. generate a new 2
if (has_moved || has_combined) {
new_2();
}
// printf("score: %d\n", game.score);
// print_area();
}
// polling events every frame
@@ -279,6 +287,68 @@ client_poll_event()
#define CHR(ord) ((ord) + 48)
#define ORD(chr) ((chr) - 48)
uint32_t
colors(
uint32_t number
) {
switch (number) {
case 0:
return 0xFFFFFF;
case 2:
return 0x00FF00;
case 4:
return 0xFF0000;
case 8:
return 0x0000FF;
default:
return 0xFFFFFF;
}
}
uint32_t
numlen(
uint32_t n
) {
uint32_t len = 0;
while (n > 0) {
len++;
n /= 10;
}
return len;
}
uint32_t
power(
uint32_t x,
uint32_t n
) {
// x ^ n
uint32_t acc = 1;
for (int i = 0; i < n; i++) {
acc *= x;
}
return acc;
}
uint32_t
numrev(
uint32_t n
) {
uint32_t len = numlen(n);
uint32_t new = 0;
int i = 0;
while (n > 0) {
new += (n % 10) * power(10, len - (++i));
n /= 10;
}
return new;
}
// performed every frame
void
client_update_framebuffer()
@@ -292,22 +362,52 @@ client_update_framebuffer()
uint32_t tile_size = game_state->width / SIZE;
uint8_t border_width = 10;
char *n_str;
bool alloced = false;
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < SIZE; j++) {
alloced = true;
// background
uint32_t x = (border_width / 2) + i * tile_size;
uint32_t y = (border_width / 2)+ j * tile_size;
uint32_t y = (border_width / 2) + j * tile_size;
uint32_t w = tile_size - border_width;
uint32_t h = tile_size - border_width;
uint32_t background_color = 0xFFFFFF;
uint32_t background_color = colors(game.area[j][i]);
put_rect(x, y, w, h, background_color);
// number in foreground
uint32_t foreground_color = 0x000000;
uint8_t font_size = 7;
put_char(CHR(game.area[j][i]), x + border_width, y + border_width, font_size, foreground_color, background_color);
uint8_t font_size = 3;
uint32_t n = game.area[j][i];
uint32_t n_len = numlen(n);
n_str = calloc(n_len, sizeof(char));
if (n_str == NULL) {
game_state->is_running = false;
}
sprintf(n_str, "%d", n);
uint32_t n_rev = numrev(n);
uint32_t digit_offset = 1;
if (n != 0) {
put_string(n_str, x + border_width, y + border_width, font_size, digit_offset, 12, foreground_color, background_color);
}
}
}
// score display line (single line)
char *score_text = calloc(numlen(game.score), sizeof(char));
if (score_text == NULL) {
game_state->is_running = false;
}
alloced = true;
sprintf(score_text, "score: %6d", game.score);
put_string(score_text, border_width / 2, tile_size * SIZE + border_width / 2, 6, 1, 12, 0xFFFFFF, 0x000000);
if (alloced) {
free(n_str);
free(score_text);
}
}
bool
@@ -372,64 +472,20 @@ game_init()
}
game.direction = RIGHT;
}
void
tests()
{
puts("---------- TEST SHIFT LEFT <- -------------\n");
for (int i = 0; i < SIZE; i++) {
memset(game.area[i], 0, sizeof game.area[i]);
}
game.area[0][2] = 2;
game.area[0][3] = 2;
game.area[2][2] = 4;
game.direction = LEFT;
slide();
puts("---------- TEST SHIFT RIGHT -> ------------\n");
for (int i = 0; i < SIZE; i++) {
memset(game.area[i], 0, sizeof game.area[i]);
}
game.area[0][0] = 2;
game.area[0][1] = 2;
game.area[2][0] = 4;
game.direction = RIGHT;
slide();
puts("---------- TEST SHIFT UP ^^ ---------------\n");
for (int i = 0; i < SIZE; i++) {
memset(game.area[i], 0, sizeof game.area[i]);
}
game.area[2][0] = 2;
game.area[3][0] = 2;
game.area[2][2] = 4;
game.direction = UP;
slide();
puts("---------- TEST SHIFT DOWN vv -------------\n");
for (int i = 0; i < SIZE; i++) {
memset(game.area[i], 0, sizeof game.area[i]);
}
game.area[0][0] = 2;
game.area[1][0] = 2;
game.area[0][2] = 4;
game.direction = DOWN;
slide();
game.score = 0;
}
int
main()
{
uint32_t window_width = 500;
uint32_t window_height = window_width * 1.12f;
game_init();
// initialize the engine
if (engine_init(
500, 500,
window_width, window_height,
"Dangerous 2048",
client_poll_event,
client_update_framebuffer